Without changing the aperture, the HOYA Variable Density II provides the freedom to change the shutter speed according the effect desired. Effective for motion blurring effects like waterfalls, cars or blurred panning movement to make the subject stand out from the background.

When a lens is polarized, it has a built-in filter that blocks bright, reflected light. This intense light is known as glare.

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And remember, not all polarized sunglasses offer complete protection from UV rays. Always double-check that your sunglasses — whether polarized or otherwise — block 100% of UV rays, including both UVA and UVB.

Sunlight scatters in all directions. But when it strikes flat surfaces, the reflected light tends to become polarized, meaning the reflected rays travel in a more uniform (usually horizontal) direction.

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HOYA Variable Density II incorporates exclusive rotatable frame construction that consists of fixed frame and rotatable frame. The rotatable frame gets wider compared to fixed frame size in order to minimize the risk of vignetting when used on wide angle lenses.

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In still shooting, variable density filters lower the shutter speed according to the photographer’s intentions when the shutter speed cannot be lowed due to camera limits.

Progressive lenses can include polarization too. These can be handy accessories for people over 40 who spend a lot of time outdoors.

Allows wider apertures in over-lit conditions be used to decrease depth-of-field, literally focusing more attention on the subject.

Variable density filters can also increase the amount of boke when shooting in the over-lit conditions, thus, preventing the image from overexposure.

Since HOYA Variable Density II incorporates complex rotatable frame construction, please mind the risk of vignetting as follows:

Due to the specific structure of the filter frame HOYA Variable Density II requires a one size bigger lens cap than the size of the filter itself. For example, 77mm HOYA Variable Density II can take 82mm lens cap, as shown on the image below.

Polarized sunglasses can be helpful for driving too, since they reduce the glare that reflects off of cars and light-colored pavement.

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In order to avoid purchasing one of those counterfeit filters we highly recommend to purchase only from official retailers that are recognized by HOYA's official global distributors. Prior the purchase kindly inquire and verify whether a retailer is authorized by HOYA global distributor. You may find the contact in the HOYA global distributors list.

Polarized sunglasses with photochromic lenses can also be convenient for eyeglass-wearers who are in and out of the sun on any given day.

* When using the filter near or at maximum density a cross-like dark pattern will appear across the image and cannot be eliminated. This is a property of the variable ND filters.

Even with a shutter speed of 1/8000 seconds, a large aperture of f/1.4 or f/1.2 can cause overexposure. With the HOYA Variable Density II filter, overexposure issues can be avoided by adjusting the light intake.

People who spend a lot of time driving during the day should experience better comfort and visibility with polarized glasses. That, in turn, can help them drive more safely and confidently.

If you have even a small amount of refractive error, correcting your outdoor vision with prescription polarized sunglasses will help you see as clearly and comfortably as possible during the day.

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Neutral Density Filter

By using variable density filters, the shutter speed can be adjusted to the proper value to get that natural and smooth looking motion requested in video footages, as shown in the image below.

However, keep in mind that drivers, boaters and pilots may experience problems seeing certain digital displays on instrument panels while they're wearing polarized sunglasses. This can be a problem if a split-second decision depends on the information displayed on a screen.

The difference with the previous HOYA Variable Density filter is the newly designed rotatable frame with convenient knob, allowing for better operation.

Neutral density filter laser

Polarized lenses may improve comfort and visibility, but you can come across situations when polarized lenses aren't the best idea.

Polarized sunglasses don't have too many downsides, but it's still important to weigh the pros and cons. If polarization will make operating devices or vehicles difficult — or dangerous — switch to a non-polarized alternative.

Polarized sunglasses are known for their ability to block the glare that reflects off of certain surfaces. This makes them very popular among people who spend a lot of time outdoors, on the road and around bodies of water.

Variable density filters are widely used because they can replace a set of solid ND filters by providing a range density that can be adjusted according to the desired exposure settings.

In video shooting, it is fundamental to keep the shutter speed fitting the frame rate setting. That is, to keep it equal to double the frame rate for optimal results. This is because, unlike still photography, an excessively fast shutter speed may create a jarring effect and produce afterimages that will not look good in the final video.

As you can see from the image below, unlike still image, a video clip is made of a sequence of still images. With low shutter speed, each still image will blur but will look smooth in the video sequence. On the contrary, a higher shutter speed will capture the object solid and sharp, but once in a video sequence all objects will appear separated, creating jarring and unnatural looking motion.

Variable Density filter is a must-have item for video bloggers and professional video content creators. Allow cine/video cameras to set the appropriate exposures in a bright lighting conditions to achieve cinematic look.

But polarized sunglasses aren't just for people who love boating, fishing or lounging on the beach. Anyone who is bothered by outdoor glare can benefit from this type of sunglass lens.

A: Yes, Ray-Ban has a polarized lens option that can be added to most sunglasses. Polarized lenses also come with a back-surface anti-reflective coating. To find out if a pair of Ray-Ban lenses is polarized, check the Ray-Ban logo on the right lens — polarized lenses will have a “P” next to the logo.

A: Polarized lenses are not recommended for pilots because they can affect a pilot’s ability to see the liquid crystal instrument panels in the cockpit while flying. This can pose a major safety hazard.

To bump up comfort and performance, ask your eye care professional about adding anti-reflective coating to each lens. This coating reduces distracting reflections from the back surface of your lenses.

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During downhill skiing, for example, you want to be able to see the bright glare reflecting off of icy patches, so you can steer clear of them.

Some light-sensitive people, including those who have recently had cataract surgery, can also benefit from polarized lenses.

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